Why does XP not recognise my DVD RW??

Got a new laptop couple of weeks ago, so the old PC was cleaned out of old files switched off and left on the floor for 2 weeks. Come to switch it on again but no DVD drive showing in My Computer. BIOS picks it up and when i go into Device Manager its there but says driver corrupt. Unistalled it, disconnected it, tried another DVD drive but still the same.